This commit fixes an issue in the SetLayout transpiler pass when an
integer list is specified nothing was checking that the integer list
contained unique entries. Previously if a list containing duplciate
entries was passed in this would result in an invalid Layout object
being set on the property set. This would cause a cryptic error message
by later transpiler passes that would try and use that invalid Layout.
This commit fixes this by detecting if there are duplicate entries in
the int list and raising an exception directly.